Hose or pipe coupling.



No. 801,228. PATBNTED 0M. 10, 1905.

H. DUPFIN. HOSE 0R PIPE COUPLING.

APPLIOATION FILED JULY 2?;1904.

3 SHEETS-SHEET 2.

6 r "I E x x W PATENTBD OCT. 10, 1905. H. DUFFIN. HOSE OR PIPE COUPLING.APPLICATION FILED JULY 21,1904.

3 SHEETS-SHEET 3.

FIGS

r Ji UNITED STATES PATENT option.

HOSE OR PIPE COUPLING.

Specification of Letters Patent.

Patented Oct. 10, 1905.

Application filed J'nly 27, 1904. Serial No. 218,390.

To all whom, it 77mg concern:

Be it known that I, HUGH DUFFIN, a subject of the King of Great Britain,residingat Auckland, in the Colony of New Zealand, have invented a newand useful Improved Hose or Pipe Coupling; and I do hereby declare thefollowing to be a full, clear, and exact description of the same.

This invention relates to means whereby two lengths of hose or piping ofany description may be coupled together in an effective and expeditiousmanner and may be readily uncoupled.

The coupling is composed of two metal castings, to which the respectiveends of the hosing are firmly attached. One of these castings is formedwith a socket in its end provided with projecting teeth or stops on itsinner periphery. The other casting is provided with a flange, andsurrounding it is a collar that is adapted to enter the socket onthe-other casting. This collar is provided with teeth or stops on itsouter periphery which are adapted to engage with those in the socket ofthe other casting when the collar is inserted into the socket and givena slight revolving movement, and thus connect both castings together.

Means are provided whereby the two castings may be locked together andalso whereby a hermetically-tight joint may be obtained.

In the accompanying drawings, Figure 1 is a half side elevation and halfsectional elevation of the socket or female piece. Fig. 2 is an endelevation of the same. Fig. 3 isahalf side elevation and half sectionalelevation of the plug or male portion of the coupling. Fig. 4 is an endelevation of the same. Fig. 5 is a diagram illustrating the manner inwhich the locking of the two portions together is obtained. Fig. 6 is ahalf side elevation and half sectional elevation of the two portions,shown connected together. Figs. 7, 8, and 9 are side elevation,sectional elevation, and plan, respectively, of the locking meansemployed.

A is a hollow metal casting, one end of which, a, is adapted to enterone end of the hosing to be connected together and to be securedtherein. This casting is formed with an enlarged bell mouth or socket Bon its other end, and upon the inner periphery thereof are formed thefour projecting snugs or teeth C, which are each shaped with inclinedfaces 0 toward the mouth of the socket B and with a square face 0 uponits back end.

D is a tubular metal casting, one end of which is adapted to be securedin the other end of the hosing to be connected. This casting is formedwith a flange (Z about midway in its length, and surrounding it is thecollar E, that is formed with a portion 0, that overhangs the flange (Zand the shoulder of which engages with such flange. This portion 6 isadapted to enter the socket B, and its outer periphery is provided witha number of snugs or teeth F, eight of which are shown in the drawings,Fig. 4:. Each of these snugs is formed with an inclined front face f andwith a square face f on its back end. Stop-pieces f are placed injuxtaposition to two of the snugs F, as shown in Figs. 3 and 6.

The socket B is provided with a shoulder G at a point a suitabledistance behind the snugs C and is internally screw-threaded from theshoulder forward for a short distance. A sleeve H, of leather, rubber,or other suitable material, is formed with a collar it at one end. Thissleeve is inserted in the socket B, so that it shall extend inward, andis secured therein by having its collar it held against the shoulder Gof the socket by means of a ring J, screwed into the socket B. This ringand the sleeve are made of such a size as to permit of the free end ofthe pipe D passing freely through them into the socket.

In effecting the coupling the collar E has its portion inserted into thesocket B, when by reason of its engagement with the flange (Z of thecasting D the end of such casting will also be passed into the socketthrough the ring J and the sleeve H. The collar is pushed right into thesocket and given a partial revolution, when the square faces f of itssnugs F will engage with the faces 0' of the snugs C of the socket. Toinsure of such engagement being effected, stop-pieces f are provided,the edges of the snugs C engaging with one or other of such projections,so as to prevent the collar being turned too far round.

To disconnect the two portions A and D, it is then only necessary togive the collar a slight movement in the reverse direction, when thesnugs C and F will become disengaged and the two parts may be drawnasunder. To prevent such being disconnected until desired, the catchshown in detail in Figs. 7 ,8, and 9 is employed. The position of thiscatch is also shown clearly in Fig. 6, and it consists of aspring-controlled pin K, that is longitudinally mounted within a bearingformed in the top of the socket-casting B and the inner end of whichprojects into the socket, where it is provided with a catch 70, formedwith an inclined side face 71:. The other end of the pin extends to theoutside of the casting and is provided with a finger-piece K, by meansof which the pin may be drawn outward against the tendency of the springL surrounding it. The tendency of the spring is to keep the catchpressed outward toward the mouth of the socket B. The catch 7': is soarranged that its inclined face i shall engage with the inclined facefof one of the snugs F as the collar E is revolved in the socket to makethe connection. As the revolution continues the catch will be forcedinward until the snug has passed it, when its spring will force itoutward again, so that its square face shall engage with the straightside of the snug F. The collar E will thus be locked from movement ineither direction by reason of one of its snugs being in engagement withth e catch Z: and one of its projections f engaging with one of thesnugs G of the socket B in the manner before described. To release thesnug from the catch, it is only necessary to draw out the pin K therequired distance, when the collar E may be turned in order to releaseit from the socket B. The sleeve H will closely surround the inner endof the pipe D, so that no leakage will be able to occur at the joint. Itwill thus be seen that a clear passage through the castings A and D willbe obtained, so that the different lengths of hosing attached to themwill be etfectually connected.

That I claim as my invention, and desire to secure by Letters Patent. is

1. In pipe-couplings, a hollow socket-piece formed with an enlargedrecess on one end with tooth projections or snugs with inclined frontfaces upon the inner periphery of the recess in combination with atubular piece formed with a flange between its ends, a collar looselysurrounding the tubular piece and overhanging the flange adapted toenter the recess in the socket-piece, and tooth projections or snugsformed with inclined front faces upon the outer periphery of theoverhanging portion of the collar, substantially as herein specified.

2. 1n pipe-couplings, ahollow socket-piece formed with an enlargedrecess on' one end and with tooth projections or snugs upon the innerperiphery of the recess, a spring-tooth projecting normally into thespace inclosed within the recess and a rubber sleeve secured within thesocket-piece, in combination with a tubular piece formed with a flangebetween its ends, a collar loosely surrounding the tubular piece andoverhanging the flange, such overhanging portion being adapted to enterthe recess in the socket-piece, and tooth projections or snugs upon theouter periphery of the overhanging portion which are adapted to engagewith those upon the inner periphery of the recess and with thespring-tooth projecting therein, substantially as specified.

In testimony whereof I have signed this specification in the presence oftwo subscribing witnesses.

HUGH DUFFIN.

Witnesses:

E. BROOKE SMITH, W. S. LAWSON.

